Abstract

We have measured the spin-dependent total cross-section difference Δσ L in neutron-proton scattering at 66 MeV which is highly sensitive to the 3S 1- 3D 1 mixing parameter ε 1. The result Δσ L = −(26.5 ± 1.2 ± 1.6) mb is in good agreement with recent phase-shift analyses that require a large ε 1 (a stronger tensor force).

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